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A236399
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Left factorial !p, where p = prime(n).
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3
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2, 4, 34, 874, 4037914, 522956314, 22324392524314, 6780385526348314, 1177652997443428940314, 316196664211373618851684940314, 274410818470142134209703780940314, 382630662501032184766604355445682020940314, 836850334330315506193242641144055892504420940314
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OFFSET
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1,1
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LINKS
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FORMULA
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MAPLE
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lf:=n->add(k!, k=0..n-1);
[seq(lf(ithprime(n)), n=1..30)];
# 2nd program:
end proc:
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MATHEMATICA
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leftFac[n_] := Sum[k!, {k, 0, n - 1}];
a[n_] := leftFac[Prime[n]];
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PROG
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(PARI) vector(15, n, sum(k=0, prime(n)-1, k!)) \\ G. C. Greubel, Mar 29 2019
(Magma) [(&+[Factorial(k): k in [0..(NthPrime(n)-1)]]): n in [1..15]]; // G. C. Greubel, Mar 29 2019
(Sage) [sum(factorial(k) for k in (0..(nth_prime(n)-1))) for n in (1..15)] # G. C. Greubel, Mar 29 2019
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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